Worked great on my 2018 L5P, arrived on time, and was easy to install, will definitely purchase again, highly recommend.

My 2018 chevrolet silverado 3500hd 6.6 duramax z71 ltz my first diesel pkup iwatched a few videos before taken on this task as some say it's harder on driver side due to steering shaft, I had no issues because I ran my engine for a few minutes to make it easier to remove old glow plug, what is true you will drop the smaller nut that hold cable in places I ordered 8 replacement nut because I drop ome I couldn't find, the main issue anyone will have do not over tighten the small nut that holds cable to glow plug yes I snap it off due to new bags of nuts is not as good as original nut because you can feel the snuggling of the nut as new nut are different and will snap off tip of glow plug, besides that ot is a very easy job just do not over tighten and using anti-seizeon shaft also can cause you to over tighten this will ruin your day on a single job that's now a major one so I do recommend these glow plugs and anyone can do the job I recommend using a 1/4 inch extension on the glow plug near steering shaft with a swivel head socket and watch viedos to learn from